Displacement sensor and movement information collecting device comprising the same
US6571631B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 12, 2000 |
| Grant date | Jun 3, 2003 |
| Priority date | — |
| Expiry date | Oct 12, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P15/11
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
There is provided a displacement sensor including a moving member composed of a magnetic body; a pair of stators each composed of a magnetic body and arranged opposed to each other with respect to the moving member, the stators including driving coils and position detectors corresponding to the driving coils, respectively; and a control unit for driving, based on a detection output coming from the position detectors, the driving coils with an electric power corresponding to intervals between the moving member and the stators so that the moving member is balanced at an intermediate position between the stators and for computing a force or acceleration applied to the moving member with a driving electric power of the driving coils. A mobile data collecting apparatus utilizing the displacement sensor is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.